<!DOCTYPE html>
<html lang="zh-CN">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .a {
            font-weight: 300;
            color: red;
        }
    </style>
</head>

<body>
    <h1 class="a">这是登录页面</h1>
    <div class="login-tittle">
        <div>
            用户名: <input type="text">
        </div>
        <div>
            密码: <input type="password">
        </div>
        <button>登录</button>
    </div>
</body>

</html>